Download
To install Translation manager on Umbraco 9 - you can use nuget.
If you are running Umbraco 9 on dotnet core, you can use the Dotnet add command to add Translation Manager to your project
The recommended way to install the Translation Manager Package is via Nuget. You can run the following command in the package manager console in Visual Studio.
Latest Version : 9.1.6 Release Notes
Translation Manager v9 requires Umbraco 8/9 or above.